The KMS key identifier that will be used to encrypt the content on the replication
instance. If you do not specify a value for the KmsKeyId parameter, then AWS DMS will
use your default encryption key. AWS KMS creates the default encryption key for your
AWS account. Your AWS account has a different default encryption key for each AWS
region.

Specifies the accessibility options for the replication instance. A value of true
represents an instance with a public IP address. A value of false represents
an instance with a private IP address. The default value is true.